DEVELOPMENT OF FLEXURAL STRENGTH OF FIBER-CEMENT PLANK USING HYDRAULIC CEMENT AND GEOPOLYMER-BASED BINDERS

Abstract

This research investigates the enhancement of the flexural strength of fiber-cement planks for flooring applications using hydraulic cement and geopolymer-based binders. Fly ash from the Mae-Moh power plant and 1 M sodium hydroxide solution were utilized as primary materials for the geopolymer reaction. Crushed stone dust was used as a sand replacement, and various reinforcement materials, including coconut fibers, synthetic fibers, and glass fiber-reinforced polymer (GFRP), were incorporated to enhance flexural performance. The study evaluated the flexural and compressive strengths of 4 x 4 x 16 cm mortar specimens in accordance with BS EN 196-1 at curing ages of 3, 7, and 28 days for 6 specimens were tested. Additionally, the Modulus of Rupture of the 10 x 45 x 2.5 cm fiber-cement planks specimens in accordance with the TIS 1427-2561 at a curing age of 28 days for 4 specimens were tested. The results demonstrate the mechanical performance and durability of fiber cement boards made with hydraulic cement, compared to geopolymer-based alternatives. The results highlight the potential of geopolymer as an environmentally friendly alternative binder, contributing to sustainable construction materials.